Composition for printers&#39; inking-rollers.



UNITED STATES- PATENT OFFICE.

EDWARD L. PERRY, OF PATERSON, NEW JERSEY.

COMPOSITION FOR PRINTERS I NKING-ROLLERS.

SPECIFICATION forming part Of Letters Patent NO. 630,517, dated August8, 1899; Application filed April 5, 1899. Serial No. 711,824. (Nospecimens.)

To all whom it may concern:

Be it known that I, EDWARD L. PERRY, a citizen of the United States,residing at Paterson, in the county of Passaic and State of New Jersey,have invented certain new and useful Improvements in Composition forPrinters Inking-Rollers; and I do hereby declare that the following is afull, clear, and exact description of the same.

The present invention has for its object to provide a composition forprinters inkingrollers in which the roller will be perfectly free fromall defects of a spongy or cellular nature and possess a soft yieldingsurface with the necessary suction to take up the ink and distribute thesame evenly on the type, such roller being readily cleaned with ordinarysoap and water Without the use of naphtha or other like cleaning fluidsand will not be affected by heat or cold and its lasting qualitiesmaterially enhanced.

The several ingredients of the composition of which my improved rolleris composed consist as follows: crude india-rubber, twentyeight parts;whiting, fifty-nine parts; dry lead, eleven parts; sulfur, two parts.The crude india-rubber after being vulcanized gives to the compositionthe required toughness and necessary elasticity. The Whiting is used asa filler to give to the compound or composition the required body. Thedry lead is employed as a drier to aid in the vulcanization, and thesulfur as a vulcanizing' agent. The corn-oil is not used as a drier, butto deaden the elasticity of the composition to the required extent toproduce a soft yielding surface necessary to take up and distribute theink with the proper suction qualities, the constituent parts composingthis oil rendering it especially adapted to the purpose. To the aboveingredients are added from twenty-one to forty-two parts of cornoil andthe whole thoroughly mixed together in one mass, after which it ismolded into the desired shape and subjected to either a steam.

or dry heat of not less than 260 Fahrenheit until properly vulcanized,

Having now fully described my invention,

what I claim as new, and desire to secure by Letters Patent, is-

A composition for printers inking-rollers consisting of crudeindia-rubber, whiting, dry lead, sulfur, and corn-oil in substantiallythe proportions named.

In testimony that I claim the above I have hereunto subscribed my namein the presence of two Witnesses.

- EDWARD L. PERRY.

Witnesses:

L. 0. Hum, RAY TAYLOR.

